crocker



r' Y @uitrit tstagstzat ffitz.

nmovnlmifr m TAP. Bonnes.v

SILAS s. CROGKER, 0F -MAQUOKEM IOWA, ASSIGNO TOHIMSELF `'AND D. R. GROGKER, OFSAME PLAGE. Letters .Patent No. 60,342, elated .December 11, 166.

, TOALL WHOM IT MAY CONCERN: V w

i Be it known that I, SI'LAS S.l CROCKER, of Maquoketa, in the county of Jackson, and State of Iowa, have invented a new and Improired Tap or Hub Borer; and I do hereby declare the following to be a. full, clear, and exact description of the same,suil icient to enable one skilled in the art, to which the invention appertains to t make use of it, reference being had to the accompanying drawings, which form a part of this specieation, and in which 'my invention is represented by a perspective view.4 v

The improvement consists of a volute-shaped tool formed of a single curved plate,whose salient edge is sharpened for the purpose of reaming out a conical hole, such as that in a hnb for the reception of the box, a bung or tap hole, or that ina faucet for the reception of va spigot. In the drawings A is the handle and B the shank of the tool; C is the blade, which is formed into a vollite one edge c projecting out further than the other, d, the space between forming a throat, through whioh shape,

t the shaving out by the edge c will p ass. The screw point of the tool is used for boring into the solid wood as *i -3` in tapping barrels, but is not necessary in boring hubs. l i; v Having described my invention, what I claim therein as new, and desire to secure by Letters Patent, is-` The volute-shaped tool with a sharpened, salient spiral edge with the `gimblet point, snbstantiallyY s described. i Y A S. S. GROCKER.

Witnesses: 

